The original saying, I think, was this: "When France sneezes, Europe catches a cold (or words to that effect)." The meaning is pretty obvious.

Then people started spinning off variations. One of the most common is this: "When America sneezes, the world catches cold." In this case, we're talking about American economic clout, but there are many variations -- as this nice NPR feature explains.

But I'm convinced the true cultural equation is this one: "When Europe sneezes, America catches the cold." The whole idea is that Europe tends to be several decades ahead of America, when it comes major trends in arts, culture, etc."

Now what about religion? That's basically what we talked about in this week's "Crossroads" podcast. Click here to tune that in.

Well, for decades now, demographers have known that the active practice of religious faith was fading in most (not all) of Europe. Once again, France has been one of the easiest places to see this trend. However, in the past decade or so -- Hello, Church of England -- it's been easy to see the same struggles in other pews.

Now, several years ago here in America, we had a hurricane if ink and newsprint when the Pew Forum released its famous "Nones on the Rise" study, showing a sharp increase in the number of "religiously unaffiliated" Americans, especially among the young. The term "Nones" has been all over the place, ever since (including here at GetReligion).

Why? Well, for starters there were big political overtones. This paragraph from one of my "On Religion" columns pretty much sums that up:

The unaffiliated overwhelmingly reject ancient doctrines on sexuality with 73 percent backing same-sex marriage and 72 percent saying abortion should be legal in all, or most, cases. Thus, the "Nones" skew heavily Democratic as voters. ... The unaffiliated are now a stronger presence in the Democratic Party than African-American Protestants, white mainline Protestants or white Catholics.

In other words, a coalition of atheists, agnostics and "Nones" is now to the Democratic Party what the Religious Right (broadly defined) is to the Republican party -- the grassroots heart.

So here is the question that host Todd Wilken and I talked about this week: If the "Nones" study has received acres of headlines, why has there been so little American coverage of that stunning new Benedict XVI Centre study entitled "Europe's Young Adults and Religion"?